/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% EEEEE X X RRRR %
% E X X R R %
% EEE X RRRR %
% E X X R R %
% EEEEE X X R R %
% %
% %
% Read/Write High Dynamic-Range (HDR) Image File Format. %
% %
% Software Design %
% John Cristy %
% April 2007 %
% %
% %
% Copyright 1999-2007 ImageMagick Studio LLC, a non-profit organization %
% dedicated to making software imaging solutions freely available. %
% %
% You may not use this file except in compliance with the License. You may %
% obtain a copy of the License at %
% %
% http://www.imagemagick.org/script/license.php %
% %
% Unless required by applicable law or agreed to in writing, software %
% distributed under the License is distributed on an "AS IS" BASIS, %
% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
% See the License for the specific language governing permissions and %
% limitations under the License. %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%
*/
/*
Include declarations.
*/
#include "magick/studio.h"
#include "magick/blob.h"
#include "magick/blob-private.h"
#include "magick/exception.h"
#include "magick/exception-private.h"
#include "magick/image.h"
#include "magick/image-private.h"
#include "magick/list.h"
#include "magick/magick.h"
#include "magick/memory_.h"
#include "magick/property.h"
#include "magick/quantum-private.h"
#include "magick/static.h"
#include "magick/string_.h"
#include "magick/module.h"
#include "magick/resource_.h"
#include "magick/utility.h"
#if defined(HasOPENEXR)
#include <OpenEXR/ImfCRgbaFile.h>
/*
Forward declarations.
*/
static MagickBooleanType
WriteEXRImage(const ImageInfo *,Image *);
#endif
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% I s E X R %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% IsEXR() returns MagickTrue if the image format type, identified by the
% magick string, is EXR.
%
% The format of the IsEXR method is:
%
% MagickBooleanType IsEXR(const unsigned char *magick,const size_t length)
%
% A description of each parameter follows:
%
% o magick: This string is generally the first few bytes of an image file
% or blob.
%
% o length: Specifies the length of the magick string.
%
*/
static MagickBooleanType IsEXR(const unsigned char *magick,const size_t length)
{
if (length < 4)
return(MagickFalse);
if (memcmp(magick,"\166\057\061\001",4) == 0)
return(MagickTrue);
return(MagickFalse);
}
#if defined(HasOPENEXR)
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e a d E X R I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ReadEXRImage reads an image in the high dynamic-range (HDR) file format
% developed by Industrial Light & Magic. It allocates the memory necessary
% for the new Image structure and returns a pointer to the new image.
%
% The format of the ReadEXRImage method is:
%
% Image *ReadEXRImage(const ImageInfo *image_info,ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image_info: The image info.
%
% o exception: return any errors or warnings in this structure.
%
*/
static Image *ReadEXRImage(const ImageInfo *image_info,ExceptionInfo *exception)
{
const ImfHeader
*hdr_info;
Image
*image;
ImageInfo
*read_info;
ImfInputFile
*file;
ImfRgba
*scanline;
int
max_x,
max_y,
min_x,
min_y;
long
y;
register long
x;
register PixelPacket
*q;
MagickBooleanType
status;
/*
Open image.
*/
assert(image_info != (const ImageInfo *) NULL);
assert(image_info->signature == MagickSignature);
if (image_info->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
image_info->filename);
assert(exception != (ExceptionInfo *) NULL);
assert(exception->signature == MagickSignature);
image=AllocateImage(image_info);
status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
if (status == MagickFalse)
{
image=DestroyImageList(image);
return((Image *) NULL);
}
read_info=CloneImageInfo(image_info);
if (IsAccessible(read_info->filename) == MagickFalse)
{
(void) AcquireUniqueFilename(read_info->filename);
(void) ImageToFile(image,read_info->filename,exception);
}
file=ImfOpenInputFile(read_info->filename);
if (file == (ImfInputFile *) NULL)
{
ThrowFileException(exception,BlobError,"UnableToOpenBlob",
ImfErrorMessage());
read_info=DestroyImageInfo(read_info);
return((Image *) NULL);
}
hdr_info=ImfInputHeader(file);
ImfHeaderDataWindow(hdr_info,&min_x,&min_y,&max_x,&max_y);
image->columns=max_x-min_x+1UL;
image->rows=max_y-min_y+1UL;
image->matte=MagickTrue;
if (image_info->ping != MagickFalse)
{
(void) ImfCloseInputFile(file);
if (LocaleCompare(image_info->filename,read_info->filename) != 0)
(void) RelinquishUniqueFileResource(read_info->filename);
read_info=DestroyImageInfo(read_info);
CloseBlob(image);
return(GetFirstImageInList(image));
}
if (SetImageExtent(image,0,0) == MagickFalse)
{
(void) ImfCloseInputFile(file);
if (LocaleCompare(image_info->filename,read_info->filename) != 0)
(void) RelinquishUniqueFileResource(read_info->filename);
read_info=DestroyImageInfo(read_info);
InheritException(exception,&image->exception);
return(DestroyImageList(image));
}
scanline=(ImfRgba *) AcquireQuantumMemory(image->columns,sizeof(*scanline));
if (scanline == (ImfRgba *) NULL)
{
(void) ImfCloseInputFile(file);
ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
}
for (y=0; y < (long) image->rows; y++)
{
q=SetImagePixels(image,0,y,image->columns,1);
if (q == (PixelPacket *) NULL)
break;
ImfInputSetFrameBuffer(file,scanline-min_x-image->columns*(min_y+y),1,
image->columns);
ImfInputReadPixels(file,min_y+y,min_y+y);
for (x=0; x < (long) image->columns; x++)
{
q->red=RoundToQuantum((MagickRealType) QuantumRange*ImfHalfToFloat(
scanline[x].r));
q->green=RoundToQuantum((MagickRealType) QuantumRange*ImfHalfToFloat(
scanline[x].g));
q->blue=RoundToQuantum((MagickRealType) QuantumRange*ImfHalfToFloat(
scanline[x].b));
q->opacity=RoundToQuantum((MagickRealType) QuantumRange-QuantumRange*
ImfHalfToFloat(scanline[x].a));
q++;
}
if (SyncImagePixels(image) == MagickFalse)
break;
}
scanline=(ImfRgba *) RelinquishMagickMemory(scanline);
(void) ImfCloseInputFile(file);
if (LocaleCompare(image_info->filename,read_info->filename) != 0)
(void) RelinquishUniqueFileResource(read_info->filename);
read_info=DestroyImageInfo(read_info);
CloseBlob(image);
return(GetFirstImageInList(image));
}
#endif
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e g i s t e r E X R I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% RegisterEXRImage() adds properties for the EXR image format
% to the list of supported formats. The properties include the image format
% tag, a method to read and/or write the format, whether the format
% supports the saving of more than one frame to the same file or blob,
% whether the format supports native in-memory I/O, and a brief
% description of the format.
%
% The format of the RegisterEXRImage method is:
%
% unsigned long RegisterEXRImage(void)
%
*/
ModuleExport unsigned long RegisterEXRImage(void)
{
MagickInfo
*entry;
entry=SetMagickInfo("EXR");
#if defined(HasOPENEXR)
entry->decoder=(DecodeImageHandler *) ReadEXRImage;
entry->encoder=(EncodeImageHandler *) WriteEXRImage;
#endif
entry->magick=(IsImageFormatHandler *) IsEXR;
entry->description=ConstantString("High Dynamic-range (HDR)");
entry->module=ConstantString("EXR");
(void) RegisterMagickInfo(entry);
return(MagickImageCoderSignature);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% U n r e g i s t e r E X R I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% UnregisterEXRImage() removes format registrations made by the
% EXR module from the list of supported formats.
%
% The format of the UnregisterEXRImage method is:
%
% UnregisterEXRImage(void)
%
*/
ModuleExport void UnregisterEXRImage(void)
{
(void) UnregisterMagickInfo("EXR");
}
#if defined(HasOPENEXR)
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% W r i t e E X R I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% WriteEXRImage() writes an image to a file the in the high dynamic-range
% (HDR) file format developed by Industrial Light & Magic.
%
% The format of the WriteEXRImage method is:
%
% MagickBooleanType WriteEXRImage(const ImageInfo *image_info,Image *image)
%
% A description of each parameter follows.
%
% o image_info: The image info.
%
% o image: The image.
%
*/
static MagickBooleanType WriteEXRImage(const ImageInfo *image_info,Image *image)
{
ImageInfo
*write_info;
ImfHalf
half_quantum;
ImfHeader
*hdr_info;
ImfOutputFile
*file;
ImfRgba
*scanline;
long
y;
MagickBooleanType
status;
register const PixelPacket
*p;
register long
x;
/*
Open output image file.
*/
assert(image_info != (const ImageInfo *) NULL);
assert(image_info->signature == MagickSignature);
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception);
if (status == MagickFalse)
return(status);
write_info=CloneImageInfo(image_info);
if (IsAccessible(write_info->filename) == MagickFalse)
(void) AcquireUniqueFilename(write_info->filename);
hdr_info=ImfNewHeader();
ImfHeaderSetDataWindow(hdr_info,0,0,(int) image->columns-1,(int)
image->rows-1);
ImfHeaderSetDisplayWindow(hdr_info,0,0,(int) image->columns-1,(int)
image->rows-1);
ImfHeaderSetCompression(hdr_info,write_info->compression == NoCompression ?
IMF_NO_COMPRESSION : IMF_PIZ_COMPRESSION);
ImfHeaderSetLineOrder(hdr_info,IMF_INCREASING_Y);
file=ImfOpenOutputFile(write_info->filename,hdr_info,IMF_WRITE_RGBA);
ImfDeleteHeader(hdr_info);
if (file == (ImfOutputFile *) NULL)
{
ThrowFileException(&image->exception,BlobError,"UnableToOpenBlob",
ImfErrorMessage());
write_info=DestroyImageInfo(write_info);
return(MagickFalse);
}
scanline=(ImfRgba *) AcquireQuantumMemory(image->columns,sizeof(*scanline));
if (scanline == (ImfRgba *) NULL)
{
(void) ImfCloseOutputFile(file);
ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
}
for (y=0; y < (long) image->rows; y++)
{
p=AcquireImagePixels(image,0,y,image->columns,1,&image->exception);
if (p == (const PixelPacket *) NULL)
break;
for (x=0; x < (long) image->columns; x++)
{
ImfFloatToHalf(QuantumScale*p->red,&half_quantum);
scanline[x].r=half_quantum;
ImfFloatToHalf(QuantumScale*p->green,&half_quantum);
scanline[x].g=half_quantum;
ImfFloatToHalf(QuantumScale*p->blue,&half_quantum);
scanline[x].b=half_quantum;
if (image->matte == MagickFalse)
ImfFloatToHalf(1.0,&half_quantum);
else
ImfFloatToHalf(1.0-QuantumScale*p->opacity,&half_quantum);
scanline[x].a=half_quantum;
p++;
}
ImfOutputSetFrameBuffer(file,scanline-(y*image->columns),1,image->columns);
ImfOutputWritePixels(file,1);
}
(void) ImfCloseOutputFile(file);
scanline=(ImfRgba *) RelinquishMagickMemory(scanline);
if (LocaleCompare(image_info->filename,write_info->filename) != 0)
{
(void) FileToImage(image,write_info->filename);
(void) RelinquishUniqueFileResource(write_info->filename);
}
write_info=DestroyImageInfo(write_info);
CloseBlob(image);
return(MagickTrue);
}
#endif
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